Wisher Performance

“You don’t gotta believe it, but you’re lookin right at it.” -Vice Grip Garage Derek

Let’s face it: when people first hear about running two injectors spraying into the snout of a supercharger, the immediate assumption is that cylinder distribution is going to suffer.

We wondered the same thing while developing AuxJection

And honestly, that’s the kind of question we care about. Any claim anyone makes, including us, is only as good as the data behind it.

We don't do assumptions here. We do data. So we tested it.

We conducted controlled engine dyno testing at Brian Tooley Racing using a built LT4 test engine topped with a Harrop 2650 supercharger. Every cylinder was monitored with its own wideband O2 sensor, EGT probe, and real-time combustion pressure transducer.

Even while pushing the system, cylinder-to-cylinder variation was minimal. We also saw supercharger rotor discharge temperature drop over 40°F at peak.

Full breakdown, logs, and setup on our tech blog:

https://www.wisherperformance.com/blogs/tech-blog/auxjection-engine-dyno-testing-results

AuxJection Systems | LTX Supplemental Fueling Kits Solve your LTX fueling limits. AuxJection combines the power of port injection with the cooling of methanol injection for Magnuson & performance LT engines.